IST1760I

Explanation
 VTAM® received
an MVS™ VARY OFFLINE command for
the subchannel cua in the MPC group defined in trlename.
The command is not allowed because the subchannel cua is
the last active Read or Write device in this MPC group.
 trlename is
the name of the TRLE that contains the subchannel.
 cua is
the subchannel address.

System action
 The VARY OFFLINE is ignored by VTAM and the CUA remains in a (system) pending offline state.
 Processing continues.

Operator response
 If the intention is to deactivate the entire
MPC group, issue a VARY OFFLINE FORCE command for     the CUA, or deactivate
the users of the     MPC group as follows: 
 Issue VARY INACT command to the related SNA PU.
Issue STOP DEVICE command to the related TCP/IP devices.
When the MPC group is used by both SNA and TCP/IP issue both VARY
INACT and STOP DEVICE.
When the MPC group is used by multiple TCP/IP stacks, a STOP DEVICE
command must be issued for each TCP/IP stack using the group.
When the MPC group is QDIO (OSA-Express) and all devices are stopped,
the MPC group will not      deactivate until a specified time period
(approximately 2 minutes) is exceeded. VARY OFFLINE      FORCE will
deactivate the MPC (QDIO) group immediately.

System programmer response
 See the z/OS Communications Server: IP Configuration
Guide for an explanation of how the keyword LASTRW
on the TRLE definition statement affects the VTAM processing related to VARY OFFLINE (when
associated with the last active read or write device in an MPC group).
Careful consideration should be given when deciding how this keyword
should be defined for your operating environment.

Routing code
 2

Descriptor code
 5